As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING PREFLIGHT THE CREW NOTICED THE EMERGENCY EXIT SIGN OVER THE MAIN CABIN DOOR DID NOT ILLUMINATE UPON TESTING. GROUND MX CREW REPLACED THE EMERGENCY LIGHT BATTERIES AND CONDUCTED AN OPS CHECK WHICH PRODUCED SATISFACTORY RESULTS. THE ACFT WAS RETURNED TO SERVICE.